GB191416770A - Improvements relating to the Supply of Air and Fuel, and Exhaust of Two Cycle Internal Combustion Engines. - Google Patents

Abstract

16,770. Brown, J. W. July 14. Two-stroke-cycle engines.-The engine in constructed so that the inlet valve remains open during nearly the whole of the compression stroke, and the exhaust valve closes at halfstroke, so that half the charge is forced in after the exhaust valve closes. In one form of the engine, Fig. 1, admission and exhaust valves e, d are arranged at opposite sides of the cylinder, and the charge is drawn in at f through a non-return valve on the outstroke. The exhaust port g is covered and uncovered by the piston c at half-stroke, and during the instroke the new charge is forced through the valve e. In a modification, Figs. 2 and 3, a piston valve k is used instead of the above valves. While the pump is drawing in a new charge, the gas-supply port m, air-supply port f, and valve port l communicate with the passage h leading to the pump. During the compression stroke, the passage h and port l are in communication with the admission port e.